/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : usbd_cdc_if.h
  * @version        : v2.0_Cube
  * @brief          : Header for usbd_cdc_if.c file.
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2021 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under Ultimate Liberty license
  * SLA0044, the "License"; You may not use this file except in compliance with
  * the License. You may obtain a copy of the License at:
  *                             www.st.com/SLA0044
  *
  ******************************************************************************
  */
/* USER CODE END Header */

/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __USBD_CDC_IF_H__
#define __USBD_CDC_IF_H__

#ifdef __cplusplus
extern "C"
{
#endif

/* Includes ------------------------------------------------------------------*/
#include "usbd_cdc.h"

/* USER CODE BEGIN INCLUDE */

/* USER CODE END INCLUDE */

/** @addtogroup STM32_USB_OTG_DEVICE_LIBRARY
  * @brief For Usb device.
  * @{
  */

/** @defgroup USBD_CDC_IF USBD_CDC_IF
  * @brief Usb VCP device module
  * @{
  */

/** @defgroup USBD_CDC_IF_Exported_Defines USBD_CDC_IF_Exported_Defines
  * @brief Defines.
  * @{
  */
/* USER CODE BEGIN EXPORTED_DEFINES */
/* Define size for the receive and transmit buffer over CDC */
/* It's up to user to redefine and/or remove those define */
#define APP_RX_DATA_SIZE 1000
#define APP_TX_DATA_SIZE 200

#define FRAME_HEAD_CODE 0xF5
#define FRAME_TAIL_CODE 0x5F
#define FRAME_STRUCTURE_CODE_LENGTH 6 // �?个完整帧中除去valid_data剩余部分的长�?

  /* USER CODE END EXPORTED_DEFINES */

  /**
  * @}
  */

  /** @defgroup USBD_CDC_IF_Exported_Types USBD_CDC_IF_Exported_Types
  * @brief Types.
  * @{
  */

  /* USER CODE BEGIN EXPORTED_TYPES */

  enum usblinkRxStateDef
  {
    _rx_state_idle = 0u,
    _rx_state_head_ok,
    _rx_state_length_high8bits_ok,
    _rx_state_length_low8bits_ok,
    _rx_state_command_ok,
    _rx_state_data_ok,
    _rx_state_sum_check_ok /* finish */
  };

  struct usblinkMessageFormatDef
  {
    struct
    {
      uint8_t *info;
      uint16_t length;
      uint8_t status_busy;
    } tx;
    struct
    {
      uint8_t *info;
      uint16_t length;
    } rx;
    uint8_t is_cdc_init_ok;
  };

  struct hostComProtocolDef
  {
    uint8_t head;
    struct
    {
      uint8_t command;
      uint16_t valid_length;
      uint8_t valid_data[APP_RX_DATA_SIZE];
    } info;
    // uint8_t sum_check;
    uint8_t tail;
  };
  /* USER CODE END EXPORTED_TYPES */

  /**
  * @}
  */

  /** @defgroup USBD_CDC_IF_Exported_Macros USBD_CDC_IF_Exported_Macros
  * @brief Aliases.
  * @{
  */

  /* USER CODE BEGIN EXPORTED_MACRO */
  /* USER CODE END EXPORTED_MACRO */

  /**
  * @}
  */

  /** @defgroup USBD_CDC_IF_Exported_Variables USBD_CDC_IF_Exported_Variables
  * @brief Public variables.
  * @{
  */

  /** CDC Interface callback. */
  extern USBD_CDC_ItfTypeDef USBD_Interface_fops_FS;

  /* USER CODE BEGIN EXPORTED_VARIABLES */

  extern struct usblinkMessageFormatDef usblinkMessage;
  extern struct hostComProtocolDef hostComProtocol;

  /* USER CODE END EXPORTED_VARIABLES */

  /**
  * @}
  */

  /** @defgroup USBD_CDC_IF_Exported_FunctionsPrototype USBD_CDC_IF_Exported_FunctionsPrototype
  * @brief Public functions declaration.
  * @{
  */

  uint8_t CDC_Transmit_FS(uint8_t *Buf, uint16_t Len);

  /* USER CODE BEGIN EXPORTED_FUNCTIONS */

  int8_t usb_printf(char *fmt, ...);
  int8_t usb_send_string(const uint16_t length, const uint8_t *buf);
  int8_t usb_send_frame(const uint8_t cmd, const uint16_t valid_length, const uint8_t *valid_data_buf);

  /* USER CODE END EXPORTED_FUNCTIONS */

  /**
  * @}
  */

  /**
  * @}
  */

  /**
  * @}
  */

#ifdef __cplusplus
}
#endif

#endif /* __USBD_CDC_IF_H__ */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
